Funny that the subject of protein has come up. Our animals are taking turns picking at two deer skeletons from last weekend. I hope they're pretty self regulating!
I think they are self regulating. I raised a couple of sebrights in my large brooder because I did not have an extra pen for them. It is darker in the brooder and they have less room to move. The two birds in the brooder eat about 1/4 the amount of the sebrights that are in the pen and they look to be in better health. They have a one gallon free feeder that is filled with 18% Nature Wise starter grower and it will last them from 3 weeks to a month even with a cup full or two being wasted. Personally, I think it is six of one or half dozen of the other. Higher protein feeds will cause them to eat less and lower protein feeds will cause them to eat more.